Ok,

So I am still trying to diagnose the reason why my 91 940 GLE will not start. I checked the timing belt, it is in perfect time. I thought it was getting fuel (could smell it coming out of the tail pipe) and I know it is getting spark, however, I am now thinking it is one of three things (or some combo of the three):
-fuel filter
-fuel regulator
-fuel pump

What I need to know is: did the 940 GLE (B234F with Bosch ignition system) have just one fuel pump, or did it also have an internal fuel pump in the tank as well?


Thanks

Dear hummeri,

May this find you well. In the event you've not done so, have you checked the RPM/Crank sensor? This device, which sits atop the transmission bell housing, just behind the engine (passenger side corner) senses flywheel/flexplate rotation and sends a signal to the fuel pump to "send fuel".

If it fails - and it can fail in "intermittent mode" - the fuel pump ceases to run and the engine will not start.

Do you hear the fuel pump run for 1-2 seconds, as soon as you turn the key. If not, the crank sensor has died. If so, then the crank sensor could be OK?

Bosch fuel systems use two pumps: an in-tank pre-pump and an external main pump. According to the Volvo pocket data booklet, Cars, 700,850,900 (1991-1996),
the B234 shares fuel system parts with the more common B230 engine.

The main pump Bosch part number is 0 580 464 039. The Volvo part number is 13 89 449-8.

For the pre-pump the Volvo part number is 35 07 436-8 (no Bosch number is provided). Note that Volvo part numbers are subject to revision.

Hope this helps.

Yours faithfully,

spook